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Mesoporous triazole and urea based carbon nitride material

a carbon nitride and mesoporous triazole technology, applied in the field of three-dimensional nitrogen rich mesoporous materials, can solve the problems of limited surface area and chemical reactivity, and catalysts inefficient for cosub>2 /sub>activation

Inactive Publication Date: 2021-09-16
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention has various objects, features, and advantages. The detailed description of the invention is only meant to show specific examples, as there may be various changes and modifications within the scope of the invention. These changes and modifications will be apparent to those skilled in the art from the detailed description.

Problems solved by technology

Many of the aforementioned catalysts suffer in that they have limited surface area and chemical reactivity due to lack of significant and accessible N—H bonds.
These deficiencies make the catalysts inefficient for CO2 activation.

Method used

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  • Mesoporous triazole and urea based carbon nitride material
  • Mesoporous triazole and urea based carbon nitride material
  • Mesoporous triazole and urea based carbon nitride material

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Mesoporous 3D KIT-6 Silica Template with Different Pore Diameters

[0058]KIT-6 having different pore diameters was synthesized by using a P123 and n-butanol mixture as the structure directing agent at different synthesis temperatures. In a typical synthesis, P123 (4.0 g) was dispersed in a water (144 g) and HCl solution (7.9 g), and stirred for 3 hours at 35° C. to obtain an aqueous P-123 homogeneous solution. 1-Butanol (4.0 g) was added to the aqueous P-123 homogeneous solution and the mixture was stirred for a further 1 hour. TEOS (8.6 g) is then added and stirring was continued at 35° C. for 24 hours to produce a reaction mixture. Subsequently, the reaction mixture was aged at 100° C. for 24 h under static conditions. At these conditions a white solid product was formed. The white solid product was filtered without washing under hot conditions and dried at 100° C. for 24 hours in an air oven. Finally, the product was calcined at 540° C. in air to decompose the triblo...

example 2

(Synthesis of 3-Amino-1,2,4-Triazole and Urea Based c-MCN Materials (MCN-TU-X) with Different Pore Diameters)

[0059]MCN-TU-X materials with three dimensional body centered cubic porous structure and various textural parameters were prepared by using 3D mesoporous silica KIT-6-X having various pore diameters as templates. Calcined KIT-6-X (1 g, X=100° C., 130° C., 150° C.) was thoroughly mixed with the solution obtained by dissolving 3-amino-1,2,4-triazole (3.0 g) and urea (3.0 g) in deionize water (DI) water (4-5 g) with conc. HCl (0.168 g). The mixture was placed in a drying oven for 6 hours at 100° C. and carbonized in a step-wise manner. The dried material was heated to 160° C. and maintained there for another 6 hours and then heated at 500° C. under inert atmosphere to produce a carbonized composite. The carbonized composite was treated with HF (5 wt. %) at room temperature to dissolve the silica template. The obtained template free MCN-TU-X was filtered, washed several times wit...

example 3

Characterization of MCN-TU-150

[0060]XRD: Powder XRD patterns were recorded on a Rigaku Ultima+(JAPAN) diffractometer using CuKα (λ=1.5408 Å) radiation. Low angle powder x-ray diffractograms were recorded in the 20 range of 0.6-6° with a 2θ step size of 0.0017 and a step time of 1 sec. In case of wide angle X-ray diffraction, the patterns were obtained in the 20 range of 10−80° with a step size of 0.0083 and a step time of 1 sec. FIG. 4 shows the low angle powder XRD patterns of MCN-TU-X of the present invention. FIG. 5 is a wide angle powder XRD pattern of MCN-TU-X of the present invention.

[0061]The XRD pattern of the MCN-TU showed a well resolved peak with several weak higher order reflections. The highly intense peak was indexed to (211) reflection of the cubic type Ia3d structure, almost similar to the parent mesoporous silica template, KIT-6. The unit cell parameter from the (211) reflection was measured to be 23.24 nm for MCN-TU-150, which was slightly lower than that of the pa...

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Abstract

Carbon nitride materials and method of making said carbon nitride materials is described. The carbon nitride materials can be a three dimensional C3N5 3-amino-1,2,4,-triazole and urea based mesoporous carbon nitride matrix having an atomic carbon to nitrogen ratio of 0.55 to 0.8 and basic nitrogen containing groups of between 0.15 to 0.25 mmol per gram.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority of U.S. Provisional Patent Application No. 62 / 377,793 filed Aug. 22, 2016, which is hereby incorporated by reference in its entirety.BACKGROUND1. Field of the Invention[0002]The invention generally concerns a three-dimensional nitrogen rich mesoporous material having a general formula of C3N5. In particular, the invention concerns a nitrogen rich mesoporous that includes a three dimensional C3N5 3-amino-1,2,4,-triazole and urea based mesoporous carbon nitride matrix having an atomic carbon to nitrogen ratio of 0.55 to 0.8 and basic nitrogen containing groups of between 0.15 to 0.25 mmol per gram.2. Description of Related Art[0003]Due to its multiple surface functionalities and basic sites, carbon nitrides materials can be used for CO2 activation. However due to the reduced numbers and accessibility to the N—H functionality of carbon materials responsible for activation, the development of a ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J20/28B01J20/02B01J20/30B01J27/24B01J35/04B01J35/10B01J37/06B01J37/08C01B21/06
CPCB01J20/28083B01J20/0259B01J20/28061B01J20/3078B01J27/24C01B21/0605B01J35/1019B01J35/1061B01J35/1042B01J37/06B01J37/082B01J35/04B01D53/02B01D53/047B01J27/224B01J37/0018B01D2253/102B01D2253/202B01D2253/25B01D2253/308B01D2257/504B01D2258/0283B01D2258/06B01J20/3057B01J20/28057B01J37/0009Y02C20/40Y02P20/151B01J35/30B01J35/56B01J35/615B01J35/633B01J35/635B01J35/647
Inventor VINU, AJAYANMANE, GURUDAS P.RAVON, UGOALBAHILY, KHALID
Owner SABIC GLOBAL TECH BV
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